Pigment unit dose detergent

Abstract

The present disclosure provides a unit dose detergent comprising a water-soluble film material comprising a first compartment that is adjacent to a second compartment and separated by at least one layer of the film. The first compartment encloses a liquid composition comprising a non-aqueous solvent, and the second compartment encloses a powder composition comprising a pigment and at least one additive selected from a salt, a flow aid, acid, enzyme, chelating agent, a polymer, and any combination thereof; such that at least one of the liquid composition and the powder composition comprises a surfactant. Also provided is a method of preparing the powder composition for use in the unit dose detergent. The method includes adding the pigment to a salt to provide a pigment-salt combination and adding a flow aid to the pigment-salt combination to form the powder composition.

What is claimed is: 
     
         1 . A unit dose detergent comprising a water-soluble film material comprising at least a first compartment and a second compartment; wherein the first compartment is adjacent to the second compartment and the first and second compartments are separated by at least one layer of the film;
 the first compartment enclosing a liquid composition comprising a non-aqueous solvent; and   the second compartment enclosing a powder composition comprising a pigment and at least one additive selected from a salt, a flow aid, acid, enzyme, chelating agent, a polymer, and any combination thereof;   wherein at least one of the liquid composition and the powder composition comprises a surfactant.   
     
     
         2 . The unit dose detergent of  claim 1 , wherein the pigment comprises at least one metal selected from the group consisting of aluminum, barium, cadmium, chromium, cobalt, copper, iron oxide, manganese, mercury, titanium, zinc, and any combination thereof. 
     
     
         3 . The unit dose detergent of  claim 1 , wherein the powder composition comprises about 0.001 wt % to about 3 wt % of pigment. 
     
     
         4 . The unit dose detergent of  claim 1 , wherein the powder composition does not contain a dye. 
     
     
         5 . The unit dose detergent of  claim 1 , wherein the non-aqueous solvent comprises an alcohol, a polyol, or a combination thereof. 
     
     
         6 . The unit dose detergent of  claim 5 , wherein the non-aqueous solvent comprises glycerin, propylene glycol, or a mixture thereof. 
     
     
         7 . The unit dose detergent of  claim 1 , wherein the liquid composition further comprises an additive selected from water, enzyme, performance polymer, rheology modifier, anti-redeposition polymer, chelating agent, fragrance, bitterant, and any combination thereof. 
     
     
         8 . The unit dose detergent of  claim 7 , wherein the liquid composition comprises water in an amount of 1 wt % to 20 wt % relative to the components in the liquid composition. 
     
     
         9 . The unit dose detergent of  claim 8 , wherein the liquid composition comprises about 3 wt % to about 8 wt % water. 
     
     
         10 . The unit dose detergent of  claim 1 , wherein the liquid composition comprises at least one surfactant selected from a cocamide monethanolamine (MEA-cocoate), a cocoate, a monoethanolamine salt of a linear alkylbenzene sulfonate (MEA-LAS), an alkylether sulfate, a distyrylbiphenyl disulfonate, and any combination thereof. 
     
     
         11 . The unit dose detergent of  claim 1 , wherein the liquid composition has a pH of about 7.5 to about 11. 
     
     
         12 . The unit dose detergent of  claim 1 , wherein the powder composition comprises a salt selected from a chloride, a bromide, an iodide, a fluoride, a nitrate, a nitrite, a sulfate, a sulfite, a sulfide, a phosphate, a phosphide, a carbonate, a bicarbonate, and any combination thereof. 
     
     
         13 . The unit dose detergent of  claim 1 , wherein the powder composition comprises a flow aid selected from zeolite, calcium oxide, silica, a silicate, an aluminate, a citrate, a carbonate, a bicarbonate, a phosphate, a stearate, a clay, flour, fly ash, starch, and any combination thereof. 
     
     
         14 . The unit dose detergent of  claim 1 , wherein the powder composition comprises an alkylbenzene sulfonate. 
     
     
         15 . The unit dose detergent of  claim 1 , wherein the second compartment surrounds the first compartment. 
     
     
         16 . The unit dose detergent of  claim 1 , wherein the water-soluble film material comprises polyvinyl alcohol. 
     
     
         17 . A method of preparing the powder composition of the unit dose detergent of  claim 1  comprising adding the pigment to a salt to provide a pigment-salt combination;
 followed by adding a flow aid to the pigment-salt combination to form the powder composition. 
 
     
     
         18 . The method of  claim 17 , wherein the powder composition comprises about 0.001 wt % to about 3 wt % of pigment. 
     
     
         19 . The method of  claim 17 , wherein the salt comprises a chloride, a bromide, an iodide, a fluoride, a nitrate, a nitrite, a sulfate, a sulfite, a sulfide, a phosphate, a phosphide, a carbonate, a bicarbonate, a citrate, or any combination thereof. 
     
     
         20 . The method of  claim 17 , wherein the flow aid comprises silica, calcium oxide, a silicate, an aluminate, a citrate, a carbonate, a bicarbonate, a phosphate, a stearate, a clay, flour, fly ash, starch, zeolite, or any combination thereof.